Figure 3
From: Left hemispheric α band cerebral oscillatory changes correlate with verbal memory
Co-ordinates of left central region and time–frequency spectrogram. (a) Co-ordinates of the left postcentral gyrus [MNI co-ordinates (− 59.8, − 16.3, 37.9)] that had a significant correlation at 1,000–1,500 ms in the α band after presentation of the task. (b) Correlation plot of the rank of absolute ERD power value and the rank of verbal memory score at the position of the left postcentral gyrus. Both ERD power value and verbal memory score were ranked in descending order. The dotted line represents a linear regression line, and rs represents Spearman’s rank correlation coefficient. (c) Average time–frequency spectrogram in the postcentral gyrus from all subjects. The horizontal axis represents time, and the red dotted line represents the time at which the task was presented (0 ms). The vertical axis indicates frequency ranging from 1 to 50 Hz. The colour map shows the power spectrum of ERS/ERD. The area surrounded by a white square indicates area of 1,000–1,500 ms in the α band.
